Magnetically induced super resolution in a novel magneto-optical disk

“…In order to raise the recording density, reduction of the size of recorded marks is essential which is, however, limited by the optical readout resolution of the MO head. Aratani et al presented magnetically induced super resolution (MSR) technology which overcomes the optical resolution limit [3]. In this paper, we report the DOW disk with MSR function which is obtained by utilizing the exchange-coupled multilayer film.…”

Section: Introductionmentioning

confidence: 99%

“…[3] briefly, then the combination of DOW and MSR. Figure 1 shows the magnetic states in the quadrilayer film for a DOW disk schematically.…”

Section: Dow and Msr Readoutmentioning

confidence: 99%

Direct Overwriting and Super Resolution Readout by Exchange-Coupled Multilayer Film

et al. 1993

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Abstract-A magneto-optical disk with the functions of direct overwriting by light intensity modulation method and of magnetically induced super resolution readout was realized by utilizing an exchange-coupled multilayer film. Magnetic hysteresis loop measurement clarified that these two functions can work independently at different temperature ranges. Write and read characteristics measurement also proved this and an equivalent CN ratio with that of a disk without direct overwrite function was obtained.

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“…In magnetooptical systems using the writing strategy of laserpumped magnetic field modulation (LP-MFM), bits as small as one tenth of the laser spot size can be written [2]. Domains smaller than the optical resolution can be detected in readout by using magnetically induced super resolution (MSR) [3]. In this technique, the temperature distribution of the laser spot creates an aperture in an additional readout layer, and the domains are reproduced through the aperture as isolated bits.…”

Section: Introductionmentioning

confidence: 99%

Spatial resolution of domain copying in a magnetic domain expansion readout disk

Blom

Horikx²,

Bloemen³

et al. 2001

IEEE Trans. Magn.

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Abstract-In a magnetic amplifying magnetooptical system (MAMMOS) disk, the copying process of a magnetic domain from the recording layer into the readout layer is investigated by using a laser spot diameter of 0.66 m. Interference between neighboring bits occurs when the spatial resolution of the copy process is larger than half the domain size. It is observed that a reduction of the readout power from 2.3 to 2.0 mW corresponds to a decrease of the copy window from 0.5 to 0.06 m. As a result, at 2.0 mW packed magnetic domains with a width of only 0.11 m have been resolved without interference by using domain expansion.

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Magnetically induced super resolution in a novel magneto-optical disk

Cited by 69 publications

References 0 publications

Exchange-Coupling in Triple-Layered Films

Exchange-Coupling in Triple-Layered Films

Direct Overwriting and Super Resolution Readout by Exchange-Coupled Multilayer Film

Spatial resolution of domain copying in a magnetic domain expansion readout disk

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